One- and two-dimensional coordination polymers of substituted tetrazoles with cadmium(II)

The reactions of Cd(NO3)(2)center dot 4H(2)O with derivatized tetrazolate ligands yielded a series of coordination polymers of the Cd(II)/iminetetrazolate/anion/solvent family. [Cd(4-Hpyrtet)(2)(OH)(2)] (1) (4-Hpyrtet = 4-pyridinetetrazole) is two-dimensional with the ligand in the protonated form with the tetrazole N3 site as the protonation location. The Co(II) and Cu(II) analogous [M(4-pyrtet)(2)(H2O)(2)] (M = Co (2), Cu (3)) are structurally similar to 1, but with the aqua ligands projecting to the intralamellar voids rather than into the interlamellar domains, as observed for the hydroxy groups of 1. The 2-pyridyltetrazolate derivative [CdCl(2-pyrtet)(DMF)] (4) is one-dimensional with chloride and DMF ligands projecting from a {Cd(2-pyrtet)}(n)(n+) ribbon. Compound 5, [Cd4Cl6(prytet)(2)(DMF)(4)], (prytet = pyrazinetetrazolate) is two-dimensional and exhibits {Cd4Cl6} secondary building units linked through tetrazolate groups and pyrazine units into the network structure. The azide derivative, [Cd-3(N-3)(4)(4-pyrtet)(2)(H2O)(2) (6), is a "pillared" layer three-dimensional framework with {Cd-3(N-3)(4)(tetrazolate)(2)(H2O)(2)}(n) layers through the 4-pyrtet ligands. (C) 2012 Elsevier B. V. All rights reserved.